NET

15 For we are a sweet aroma of Christ to God among those who are being saved and among those who are perishing—

Darby

15 For we are a sweet odour^D8393 of Christ to God, in the saved and in those that perish:

Darby Bible Notes

odour - An allusion to the Roman triumphal processions, in which sweet odours were used, and when often many captives were killed, while others were spared. The 'sweet odour' was therefore unto death or unto life, as the gospel when received is a means of life, but when not received, however sweet it may be, is only a cause for condemnation.

KJV

15 For we are unto God a sweet savour of Christ, in them that are saved, and in them that perish: